linux-kernel - [PATCH 1/8] dmaengine: bcm2835: set residue

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Message-Id: <1458156302-4359-2-git-send-email-eric@anholt.net>
Date:	Wed, 16 Mar 2016 12:24:55 -0700
From:	Eric Anholt <eric@...olt.net>
To:	linux-rpi-kernel@...ts.infradead.org
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Stephen Warren <swarren@...dotorg.org>,
	Lee Jones <lee@...nel.org>, Vinod Koul <vinod.koul@...el.com>,
	dmaengine@...r.kernel.org, Martin Sperl <kernel@...tin.sperl.org>,
	Matthias Reichl <hias@...us.com>,
	Noralf Trønnes <noralf@...nnes.org>,
	Eric Anholt <eric@...olt.net>
Subject: [PATCH 1/8] dmaengine: bcm2835: set residue_granularity field

From: Martin Sperl <kernel@...tin.sperl.org>

bcm2835-dma supports residue reporting at burst level but didn't report
this via the residue_granularity field.

See also:
https://github.com/raspberrypi/linux/commit/b015555327afa402f70ddc86e3632f59df1cd9d7
for the downstream patch.

Signed-off-by: Matthias Reichl <hias@...us.com>
Signed-off-by: Noralf Trønnes <noralf@...nnes.org>
Signed-off-by: Martin Sperl <kernel@...tin.sperl.org>
Reviewed-by: Eric Anholt <eric@...olt.net>
Signed-off-by: Eric Anholt <eric@...olt.net>
---
 drivers/dma/bcm2835-dma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c
index 996c4b0..2d72fe8 100644
--- a/drivers/dma/bcm2835-dma.c
+++ b/drivers/dma/bcm2835-dma.c
@@ -625,6 +625,7 @@ static int bcm2835_dma_probe(struct platform_device *pdev)
 	od->ddev.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
 	od->ddev.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
 	od->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+	od->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
 	od->ddev.dev = &pdev->dev;
 	INIT_LIST_HEAD(&od->ddev.channels);
 	spin_lock_init(&od->lock);
-- 
2.7.0